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Dual Roles of Graphene Oxide in Chondrogenic Differentiation of Adult Stem Cells: Cell-Adhesion Substrate and Growth Factor-Delivery Carrier

机译:氧化石墨烯在成体干细胞软骨分化中的双重作用:细胞粘附基质和生长因子传递载体。

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摘要

Here, it is shown that graphene oxide (GO) can be utilized as both a cell-adhesion substrate and a growth factor protein-delivery carrier for the chondrogenic differentiation of adult stem cells. Conventionally, chondrogenic differentiation of stem cells is achieved by culturing cells in pellets and adding the protein transforming growth factor-β3 (TGF-β3), a chondrogenic factor, to the culture medium. However, pellets mainly provide cell-cell interaction and diffusional limitation of TGF-β3 may occur inside the pellet both of these factors may limit the chondrogenic differentiation of stem cells. In this study, CO sheets (size = 0.5-1 μm) were utilized to adsorb fibronectin (FN, a cell-adhesion protein) and TGF-β3 and were then incorporated in pellets of human adipose-derived stem cells (hASCs). The hybrid pellets of hASC-GO enhanced the chondrogenic differentiation of hASCs by adding the cell-FN interaction and supplying TGF-β3 effectively. This method may provide a new platform for stem cell culture for regenerative medicine.
机译:在此,显示出氧化石墨烯(GO)既可以用作细胞粘附基质,又可以用作成体干细胞软骨分化的生长因子蛋白传递载体。通常,干细胞的软骨形成分化是通过在沉淀中培养细胞并将软骨形成因子蛋白质转化生长因子-β3(TGF-β3)添加到培养基中来实现的。然而,沉淀主要提供细胞-细胞相互作用,并且TGF-β3的扩散限制可能发生在沉淀内部,这两个因素都可能限制干细胞的软骨分化。在这项研究中,CO片(大小= 0.5-1μm)被用来吸附纤连蛋白(FN,一种细胞粘附蛋白)和TGF-β3,然后被掺入人类脂肪干细胞(hASCs)的颗粒中。 hASC-GO的杂交颗粒通过增加细胞-FN相互作用并有效地提供TGF-β3来增强hASCs的软骨形成分化。该方法可为干细胞培养再生医学提供新的平台。

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  • 来源
    《Advanced Functional Materials》 |2014年第41期|6455-6464|共10页
  • 作者单位

    School of Chemical and Biological Engineering Seoul National Univeristy Seoul 151-744, Republic of Korea;

    School of Chemical Engineering Sungkyunkwan University Suwon 440-746, Republic of Korea;

    School of Chemical and Biological Engineering Seoul National Univeristy Seoul 151-744, Republic of Korea;

    Department of Chemical Engineering Kyung Hee University Yongin 446-701, Republic of Korea;

    School of Chemical and Biological Engineering Seoul National Univeristy Seoul 151-744, Republic of Korea;

    School of Chemical and Biological Engineering Seoul National Univeristy Seoul 151-744, Republic of Korea;

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